Youths under 25 with student ID are free to enter. The second and fourth floors are the central exhibition area, you can rent audio guides, 4 euros per person. The main exhibition here is Picasso, Dali and Miró works. Picasso's Guernica is the treasure of the town hall, there are many people around the front, quite a bit of the Mona Lisa taste. Worth going and worth renting a guide tour